Study by resonant ultrasound spectroscopy of the elastic constants of the β phase in CuAlNi shape memory alloys

✍ Scribed by V. Recarte; J.I. Pérez-Landazábal; M.L. Nó; J. San Juan

• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 129 KB
• Volume: 370
• Category: Article
• ISSN: 0921-5093
• DOI: 10.1016/j.msea.2003.06.004

✦ Synopsis

The evolution with temperature of the elastic constants of the metastable ␤ phase in a Cu-27.96 at.%Al-3.62 at.% Ni shape memory alloy (SMA) has been studied by resonant ultrasound spectroscopy (RUS). The corresponding elastic constants of this cubic phase have been measured near the martensitic transformation temperature in a single crystal. Above the martensitic transformation temperature, an anomalous behavior has been found in the C elastic constant which shows a softening as the temperature decreases. The internal friction value Q -1 has been obtained in this temperature range from the RUS spectra. The mechanisms associated with the Q -1 increase must be related to {1 1 0} shear.